Key result
Dexrazoxane preincubation antagonizes doxorubicin- and daunorubicin-mediated growth inhibition in Chinese hamster ovary cells.
Why the study?
Dexrazoxane is used clinically to reduce doxorubicin-induced cardiotoxicity, but its effect on the growth inhibition caused by doxorubicin and daunorubicin was unclear.
Does dexrazoxane alter the growth inhibitory effects of doxorubicin and daunorubicin in Chinese hamster ovary cells?
Does dexrazoxane alter the growth inhibitory effects of doxorubicin and daunorubicin in Chinese hamster ovary cells?
Dexrazoxane antagonizes the growth inhibitory effects of anthracyclines in vitro when administered prior to anthracycline exposure, highlighting complex interactions at the level of DNA topoisomerase II.
May attenuate anthracycline cytotoxicity if pre-administered in vitro; leaves open optimal sequencing for cardioprotection in patients.
Dexrazoxane (ICRF-187) is clinically used to reduce doxorubicin-induced cardiotoxicity. Because dexrazoxane, doxorubicin and daunorubicin all act on DNA topoisomerase II, a study was undertaken to see what effect dexrazoxane had on the growth inhibitory effects of doxorubicin and daunorubicin towards Chinese hamster ovary cells. Dexrazoxane exhibited significant antagonism of doxorubicin- and daunorubicin-mediated growth inhibition when the cells were preincubated with dexrazoxane before the anthracycline was added. Continuous exposure of cells to either anthracycline and low concentrations of dexrazoxane resulted in additive growth inhibitory effects at low anthracycline concentrations, and no effect at higher anthracycline concentrations.
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Hasinoff et al. (1996) studied In vitro study on Chinese hamster ovary cells. Dexrazoxane (ICRF-187) vs. Doxorubicin and daunorubicin alone was evaluated on Growth inhibition of Chinese hamster ovary cells. Dexrazoxane exhibited significant antagonism of doxorubicin- and daunorubicin-mediated growth inhibition when Chinese hamster ovary cells were preincubated with dexrazoxane.
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